Advanced Materials & Manufacturing – Page 577

Strain and Structure in Nanocrystals

Bae Y., Caflisch R.E., University of California, Los Angeles, US

Layered nanocrystals consist of a core of one material surrounded by a shell of a second material. Because of the small size of these systems, their atomic structure is epitaxial in many cases. Lattice mismatch [...]

Effect of Nano-architectural Control on Optical Loss in Electro-optic Polymers

Huang D., Parker T.C., Lumera Corporation, US

Polymer electro-optic (EO) devices show great promise for high-speed telecom data transmission, broadband radio frequency (RF) signal distribution, and high-speed data transfer within the next generation of microprocessors running at 20 GHz and above (i.e., [...]

Environmentally Friendly Pathways for Synthesis of Titanium Dioxide Nano-particles

Li H., Sunol A.K., Sunol S.G., Sunol A.K., Sunol S.G., University of South Florida, US

Titanium Dioxide is an important catalyst for oxidation of hazardous compounds in air and water particularly for photo-catalysis. Although it is traditionally used for photo-catalysis with UV light, when its energy band gap is reduced, [...]

Direct Electrochemical Reduction of CuO Nano Particles to Cu Nano Particles in NaCl Solution

Hwang G-H, Han W-K, Hong S-J, Choi J.W., Kang S-G, Hanyang University, KR

Copper nanoparticles are widely used material. However many reactive metals are difficult to produce without complex and expensive procedures. For low cost and mass production, the electrochemical reduction is a convenient technique to manufacture metal [...]

Synthesis of Antimony Oxide Nanoparticles by Thermal Oxidation

Xu C.H., Shi S.Q., Tang Q., The Hong Kong Polytechnic University, HK

Antimony (Sb) oxide can be used as catalyst, retardant, fining agent, and optical material. Recently, hydrous Sb oxide was found to have high proton conductivity, which is likely to be a promising humidity-sensing material. Oxide [...]

Charge Trapping and Charge Decay in Silicon Nanocrystals

Ng C.Y., Ding L., Chen T.P., Nanyang Technological University, SG

For applications of silicon nanocrystals in memory device, it is necessary to understand the discharging behaviors of the nanocrystals as the data endurance in memory and decay constant are important parameters to be measured. In [...]

Optical Properties of Silicon Nanocrystals Embedded in SiO2 Matrix

Ding L., Chen T.P., Liu Y., Nanyang Technological University, SG

In this work, spectroscopic ellipsometry (SE), which is a nondestructive method, is employed to determine the optical constants (refractive index and extinction coefficient) and thus the dielectric functions of the isolated nc-Si with a mean [...]

Vibrational Modes of Metal Nanoshells

Kirakosyan A.S., Shahbazyan T.V., Jackson State University, US

We study coherent oscillations of radial breathing modes in metal nanoparticles with a dielectric core. Vibrational modes are impulsively excited by a rapid heating of the particle lattice that occurs after laser excitation, while the [...]

Surface-Enhanced Raman Scattering in Small Noble-Metal Nanoparticles

Pustovit V.N., Shahbazyan T.V., Jackson State University, US

We present a microscopic theory of quantum-size effects in surface-enhanced Raman scattering (SERS) from molecules adsorbed on small metal nanoparticles. In noble-metal nanoparticles, the confining potential has different effect on s-band and d-band electrons. Namely, [...]

Low Temperature Synthesis of Nanosized Metal Oxides by a Supercritical Seed Enhanced Crystallization process (SSEC)

Jensen H., Joensen K.D., Iversen S.B., Søgaard E.G., Aalborg University, DK

A novel low temperature method has been developed to produce nanosized crystalline materials. The method, a Supercritical Seed Enhanced Crystallization (SSEC) process, was shown to lower the crystallization temperature for several metal oxides by a [...]